Remove unmaintained expired ports from editors
2011-05-01 editors/MathPlanner: Upstream says project is canceled and no more
distfiles can be found
2011-05-01 editors/bitmap: Upstream disapear and distfile is no more available
2011-05-01 editors/bitmap-emacs21: Upstream disapear and distfile is no more
available
2011-05-01 editors/cle: Upstream disapear and distfile is no more available
2011-05-01 editors/dedit: Upstream disapear and distfile is no more available
2011-05-01 editors/em: Upstream disapear and distfile is no more available
2011-05-01 editors/leim21: Distfile is no more available
2011-05-01 editors/lpe: Upstream disapear and distfile is no more available
2011-05-01 editors/vilearn: Upstream disapear and distfile is no more available
2011-05-01 editors/xenon: Upstream disapear and distfile is no more available